Over the years I've repaired and/or modified hundreds of PSU boards - but what you are suggesting is exactly the opposite of what the OP needs, it doesn't have a doubler but you could add one if you wanted it to run off 60V the OP wants to go in the opposite direction and run a 120V only unit from
220V if it had a doubler that would be piss easy to disable, but it hasn't so the only options are use an auto transformer or get a 240V PSU!Like I said - do please try to pay attention!!!